The library directory where you want to save the iParts must have the same name as the factory library, preceded with an underscore character. Because these parts are reused in many assemblies, we recommend that you store them in a library whose path is included in your active project file. Standard iPart factories generate parts that have fixed values.
Sheet Metal iParts can include: the Sheet Metal Rule, the Sheet Metal Unfold rule and the Flat Pattern orientation. If the iFeature includes a table, you can specify the iFeature row value and the suppression status for each row. You can specify which inserted iFeatures to include in the iPart. Sheet metal iParts can have feature suppression applied to features that were added to the flat pattern making individual flat patterns unique for iPart member files. For example, one configuration of the part may have an extrusion with a cut, while another has an extrusion with a join. Using feature suppression, you can include several configurations of a single part in one file. Work features, including which should be included or excluded and visibility status. iMates, specifying which should be included or suppressed, offset values, matching names, and sequence number. Threads, including different thread families, designations, classes, direction, and pipe diameter. Your bill of materials and parts list are automatically kept up to date. Properties, so that you can include information such as part number, stock number, and material. Use the Parameters Editor to rename parameters, establish equations between parameters, and create User parameters. Save the part, which is automatically saved as an iPart factory. For sheet metal iParts variations of the Sheet Metal Rule, Sheet Metal Unfold rule and Flat Pattern orientation can be defined. Use the Create iPart command to define one or more table rows that represent members of the iPart factory, specifying variations of its parameters, properties, thread information, iMate information, feature suppressions, and work features. 
Use the Parameters command to rename parameters, establish equations, and create user parameters.Determine the portion of your design that changes with each member.Start with a new or existing part or sheet metal part.When placing the part in an assembly, select the row (member) needed. For standard iParts, each iPart variation is an iPart member, which is defined by a row in the table. You use the iPart Author to create part families that contain a table. You can create these designs as iParts, and then use one or more of the variations.
Most designers have parts that differ by size, material, or other variables, although the same design works in many models.
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